Solution
The buffer has complications locating the last acquired image when it is not correspondingly identified. In case you want to add more than one image, it is needed to specify an Image Step GUID which is the acquisition step, image processing step, or image variable GUID. If you specify an Image Step GUID, the VI immediately returns any images generated by this step and does not wait until the inspection iteration completes.
You can call the VBAI Interface - Get Inspection Steps VI to obtain a list of the GUIDs associated with every step and variable as shown in the VI above.
Figure 1 - Simple VI to get multiple inspection images
Note: This image is a LabVIEW snippet, which includes LabVIEW code that you can reuse in your project. To use a snippet, right-click the image, save it to your computer, and drag the file onto your LabVIEW diagram.